Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 65 · 40 questions

The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.

1. 1.560 increased by 5% =
2. 2.40 decreased by 35% =
3. 3.640 increased by 50% =
4. 4.710 decreased by 20% =
5. 5.340 decreased by 30% =
6. 6.320 increased by 15% =
7. 7.150 increased by 8% =
8. 8.260 decreased by 5% =
9. 9.755 decreased by 20% =
10. 10.650 increased by 8% =
11. 11.280 increased by 35% =
12. 12.420 increased by 15% =
13. 13.70 decreased by 10% =
14. 14.450 decreased by 30% =
15. 15.200 decreased by 30% =
16. 16.550 increased by 8% =
17. 17.720 decreased by 40% =
18. 18.720 decreased by 35% =
19. 19.660 increased by 5% =
20. 20.440 decreased by 10% =
21. 21.220 increased by 5% =
22. 22.40 increased by 75% =
23. 23.620 increased by 10% =
24. 24.540 decreased by 5% =
25. 25.720 decreased by 35% =
26. 26.175 decreased by 8% =
27. 27.300 increased by 35% =
28. 28.750 decreased by 12% =
29. 29.325 increased by 40% =
30. 30.410 increased by 30% =
31. 31.560 increased by 35% =
32. 32.60 increased by 10% =
33. 33.100 increased by 5% =
34. 34.710 decreased by 10% =
35. 35.500 increased by 8% =
36. 36.790 increased by 30% =
37. 37.350 increased by 8% =
38. 38.160 increased by 15% =
39. 39.625 increased by 12% =
40. 40.650 increased by 12% =

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